Mold-making machine.



E. ERICSSON.

MOLD MAKING MACHINE.

APPLICATION man ram/10.1911.v

L fififi o I Patented Feb. 19,1918,

2 SHEETS-SHEET EVERT ERICSSON, OF CHRISTIANIA,

NORWAY.

MOLD-MAKING MACHINE.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed May 10, 191?. Serial No. 167,776.

To all whom 2'! may concern:

Be it known that I, Evnnr EnIcssoN, a subject of the King of Norway, residing at Christiania, Norway, have invented certain new and useful Improvements in Mold- Making Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw ings, and to letters or figures. of reference marked thereon, which form a part of this specification.

The present invention relates to a mold making machine for the casting of heavy chains of soft iron or steel.

The object of the invention is to manufacture chain molds divided into four parts by means of two longitudinal axial sections perpendicular on each other. Four mold sections of this kind are combined in the usual w y in one mold which may comprise a small or large number of chain link molds.

In the accompanying drawings Figure 1 is a side elevation partly in section of a mold pressing machine embodying my invention.

Fig. 2 is a plan view thereof.

Fig. 3 is a transverse vertical section on the line AA of Fig. 2.

Fig. 1 is an enlarged view of the pressing mechanism shown in Fig. 3.

Fig. 1* is a top View of one of the pressing members shown in Fig. 4.

Fig. 5 is a side view of the clutch actuating lever.

Fig. 5 is a detail View.

Fig. 6 is a side view of the flask and mechanism for connecting it to tie machine.

Fig. 6 is a cross section of Fig. 6.

The machine comprises a base 1, having a supporting block 2 at one end for a motor 3. On said base is a frame 4 in which pressing pistons 5 are mounted, one piston being arranged to move horizontally and the other vertically in order to press the mold sections 6.

In a casing 8, also mounted on the base 1, is a worm wheel 8', shown in dotted lines Fig. 1, said wheel being arranged to be driven by a worm shaft 8 journaled in said casing in alinement with the shaft of the motor 3 and adapted to be connected to the motor shaft by a friction clutch 7. The shaft of wheel 8 carries a pinion 9, which drives two meshing gear wheels 10 mounted on parallel horizontal shafts 11 which drive through the medium of bevel pinions 12, two parallel vertical shafts 13.

Each shaft 11 and 13 has a crank 14 which drives a pitman 15 connected by a pin 16 to a piston rod 17 slidably mounted in bearings 18 on the frame 4.

The pressing pistons 5 are connected to the two piston rods 17 by means of oblong flanges 19 and are of the same size and form as the molding sections (preferably about 100 X 1000 mm).

Said pistons slide in a box formed by the frame 4 and a guiding member 20 fas tened on the same. The pistons carry the patterns 21 which are fastened to spring aotuated slides 22 mounted in said piston rods 17. Said interior slides can perform a movement sufficiently large to permit of the pattern 21 being completely withdrawn into the piston.

The latter movement in order to obtain a clean mold must be carried out exactly at the moment when the pressing pistons have reached their interior position.

Surrounding the slide 22 is a coiled spring 25 pressing against the piston 5 and an annular shoulder 26 on the slide 22. A boss 27 on said annular shoulder 26 engages a movable abutment or hook 29 carried by the piston rod 17. lVhen the pressing piston 5 has reached its innermost position the slide 22 with the pattern is released by means of a stationary tappet 30 engaging the abutment 29 pulling the latter out of engagement with the boss 27 whereby the pattern is withdrawn by the spring 25 into the pressing piston.

On the backward stroke of the piston 5 the boss 27 on the slide 22 abuts against a stationary bracket 28, whereby the slide is moved upward compressing the spring, and being finally locked in its original position by means of the hook 29 on the piston rod 17. The pattern will then have regained correct position for the inward stroke of the pressing piston 5.

When the machine is working and the pressing pistons 5 arrive in the position farthest from the mold the friction clutch 7 is automatically released by means of the rod 31, which is connected to the slidable part of the friction clutch and'rests on the shaft 11. Said shaft 11 as shown in Fi 5 is provided with an adjustable cam or abutment which is mounted in such a position that it will engage a notch in the rod 31 and move the same so as to disengage the clutch, when the pistons have completed their backward stroke. The rod 31 is pressed against the shaft 11 by means of a'suitable weight 31.

' When the pressing pistons are in their outward position, the pressing chamber is filled with sand by means of a suitable charging device, and the mold case 32 is placed'in position.

The molding case or flask is fastened by means of the top brackets 35 carrying angular pressingfmembers 36 which are screwed against the molding case in order to keep the same in placeduring the pressing operation. The top brackets 35 are hinged to the member 20 onthe horizontal pressing case and are locked to the corresponding part on the vertical press; The latter is provided with an eye 37 adjacent the top bracket, and a locking bolt 38 passing throughthe said eye also fits into a hole in the nearest top bracket (Fig. 6). The locking bolt 38 is connected to a rod 40 which is guided in eyes 41 and provided with hand wheel 42 threaded on one end of the rodand kept in position by boss 43. V I V c When the molding case is. locked in position the clutch is thrown in by means of lever 44:. The pressing pistons 5 then move upward and press the sand into the molding case'32. When the pressing pistons 5 have reached their innermost positions the tappets 30 engage the movable hooks 29, which then release the slides 22, whereuponsprings 25 extract the slides 22 with the patterns from the molding sand, so that the molding case 32 may be taken off, and the process repeated.

. In orderto examine the patterns 21 for repairs, etc., the'boss 30 may be removed or turned back by unscrewing the bolt 30, so that the pressing pistons may be kept in their innermost position, whereupon the friction clutch is disengaged so that the pressing pistons with the patterns'are left in this position. 7 Y

WVhen the molds are finished they are placed onsuitable trucks and carried into drying furnaces where they are completely dried. I

I claim:

n 1. A 'mold making machine for the casting of continuous heavy chain, comprising two reciprocating pistons adapted to press against two ad-jacent side surfaces of a mold section, said pressing pistons carrying axially,- movable patterns adapted to bewith- 1,ese,ees

tons and released when the pistons have reached their innermostpositions.

3. A'm old making machine for the casting of continuous heavy chain, comprising two reciprocating pistons adapted to press against two adjacent side surfacesof a mold section driving mechanism forsaid pistons, means to automatically disengage said pistions from their driving mechanism'when, after having finished their pressing operation, they have returned to their outward position. a

i. A mold making machine comprising two pistons arranged to engage two adjacent sides of a mold section, means to reciprocate said pistons, patterns slidably mounted in said pistons, means actuated by a backward movement of the pistons to advance the patterns in the pistons, and means operated by a forward movement of the pistons to retract the patterns in the latter.

5. A mold making machine comprising two pistons arranged at right angles to each other, means to reciprocate said pistons, pat terns reciprocably mounted in the pistons and adapted to be projected beyond the ends of the latter, and means operated by the movements of the pistons to move the patterns relatively to the pistons in directions opposite to the movement of the pistons.

G. A mold making machine, comprising a frame, pistons mounted thereon in planes at right angles to each other, means to reciprocate the pistons, patterns slidably mounted in the pistons and adapted to be projected beyond the ends of the latter, springs adapted to retract the patterns wlthm the pistons, means operated during the movement of the pistons in one direction to project the patterns against the action of the springs, means to automatically lock the patterns in their projected position, and means operated by the movement of the pistons in the opposite direction to automatically release the locked patterns.

, 7. A mold making machine comprising a rectangular frame, hollow pistons slidably mounted on adjacent sides of the frame, means to reciprocate the pistons in planes at right angles to each other, patterns slidably mounted in the pistons and. adapted to be projected beyond the ends of the latter,

springs in the pistons adapted to retractthe.

patterns, means on the pistons and frame cooperating during the movement of the pisas my invention, I have signed my name in tons Hf) pfi'oject the patterns against the alcpresence of two subscribing witnesses. tion 0 t e springs, means to automatical y lock the patterns during said movement, and EVERT ERICSSON' 5 means on the frame to actuate the locking Witnesses:

means to release the projected patterns. C. VARMAN,

In testimony that I claim the foregoing C. FABRICIUS HANSEN.

copies of this patent may be obtained for five cents each, by addressing the commissioner of intents,

. Washington, D. 0. 

